.heart {
  position: relative;
  width: 100px;
  height: 90px;
}

.heart:after,
.heart:before {
  position: absolute;
  left: 50px;
  top: 0;
  width: 50px;
  height: 80px;
  content: '';
  background-color: skyblue;
  border-radius: 50px 50px 0 0;
  transform: rotate(-45deg);
  transform-origin: 0 100%;
}

.heart:after {
  left: 0;
  transform: rotate(45deg);
  transform-origin: 100% 100%;
}
